//
//  IrregularGridCollectionView.h
//  IrregularGridCollectionView
//
//  Created by YouXianMing on 16/8/30.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "IrregularGridCellDataAdapter.h"
#import "MaximumSpacingFlowLayout.h"
#import "CustomIrregularGridViewCell.h"
@class IrregularGridViewCellClassType;
@class IrregularGridCollectionView;@protocol IrregularGridCollectionViewDelegate <NSObject>@optional/***  IrregularGridCollectionView did selected event.**  @param collectionGridView CollectionGridView's object.*  @param cell               CustomCollectionGridViewCell type's cell.*  @param event              CustomCollectionGridViewCell's event.*/
- (void)irregularGridCollectionView:(IrregularGridCollectionView *)irregularGridCollectionView didSelectedCell:(CustomIrregularGridViewCell *)cell event:(id)event;@end@interface IrregularGridCollectionView : UIView/***  CollectionGridView's delegate.*/
@property (nonatomic, weak) id <IrregularGridCollectionViewDelegate> delegate;/***  CollectionView.*/
@property (nonatomic, strong, readonly) UICollectionView *collectionView;/***  Content edgeInsets, default is UIEdgeInsetsMake(5, 5, 5, 5).*/
@property (nonatomic) UIEdgeInsets contentEdgeInsets;/***  Horizontal item's gap, default is 5.f.*/
@property (nonatomic) CGFloat horizontalGap;/***  Vertical item's gap, default is 5.f.*/
@property (nonatomic) CGFloat verticalGap;/***  Item's height, default is 20.f.*/
@property (nonatomic) CGFloat gridHeight;/***  Register the cells.*/
@property (nonatomic, strong) NSArray <IrregularGridViewCellClassType *> *registerCells;/***  The cells data adapter.*/
@property (nonatomic, strong) NSMutableArray <IrregularGridCellDataAdapter *> *adapters;/***  To make the config effective.*/
- (void)makeTheConfigEffective;/***  Get the CollectionView's content size.*/
@property (nonatomic, readonly) CGSize contentSize;/***  Reset the view's size.*/
- (void)resetSize;#pragma mark - Constructor.+ (instancetype)irregularGridCollectionViewWithFrame:(CGRect)framedelegate:(id <IrregularGridCollectionViewDelegate>)delegateregisterCells:(NSArray <IrregularGridViewCellClassType *> *)registerCellscontentEdgeInsets:(UIEdgeInsets)edgeInsetsverticalGap:(CGFloat)verticalGaphorizontalGap:(CGFloat)horizontalGapgridHeight:(CGFloat)gridHeight;@end#pragma mark - CollectionGridViewCellClassType Class@interface IrregularGridViewCellClassType : NSObject@property (nonatomic)         Class      className;
@property (nonatomic, strong) NSString  *reuseIdentifier;@endNS_INLINE IrregularGridViewCellClassType *gridViewCellClassType(Class className, NSString  *reuseIdentifier) {IrregularGridViewCellClassType *type = [IrregularGridViewCellClassType new];type.className                        = className;type.reuseIdentifier                  = reuseIdentifier;return type;
}

//
//  IrregularGridCollectionView.m
//  IrregularGridCollectionView
//
//  Created by YouXianMing on 16/8/30.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import "IrregularGridCollectionView.h"#pragma mark - IrregularGridCollectionView Class@interface IrregularGridCollectionView () <UICollectionViewDelegate, UICollectionViewDataSource, CustomIrregularGridViewCellDelegate>@property (nonatomic, strong) UICollectionView            *collectionView;
@property (nonatomic, strong) UICollectionViewFlowLayout  *flowLayout;@end@implementation IrregularGridCollectionView#pragma mark - Init- (void)layoutSubviews {[super layoutSubviews];_collectionView.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
}- (instancetype)initWithFrame:(CGRect)frame {if (self = [super initWithFrame:frame]) {self.contentEdgeInsets   = UIEdgeInsetsMake(5, 5, 5, 5);self.horizontalGap       = 5.f;self.verticalGap         = 5.f;self.gridHeight          = 20.f;// Init UICollectionViewFlowLayout.self.flowLayout = [[MaximumSpacingFlowLayout alloc] init];// Init UICollectionView.self.collectionView = [[UICollectionView alloc] initWithFrame:self.bounds collectionViewLayout:self.flowLayout];self.collectionView.showsHorizontalScrollIndicator = NO;self.collectionView.showsVerticalScrollIndicator   = NO;self.collectionView.backgroundColor                = [UIColor clearColor];self.collectionView.delegate                       = self;self.collectionView.dataSource                     = self;[self addSubview:self.collectionView];}return self;
}- (void)makeTheConfigEffective {self.collectionView.contentInset        = self.contentEdgeInsets;self.flowLayout.minimumLineSpacing      = self.verticalGap;self.flowLayout.minimumInteritemSpacing = self.horizontalGap;
}#pragma mark - UICollectionView's delegate & data source.- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {return _adapters.count;
}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {IrregularGridCellDataAdapter *adapter = _adapters[indexPath.row];adapter.indexPath                     = indexPath;CustomIrregularGridViewCell  *cell    = [collectionView dequeueReusableCellWithReuseIdentifier:adapter.cellReuseIdentifier forIndexPath:indexPath];cell.delegate                         = self;cell.dataAdapter                      = adapter;cell.data                             = adapter.data;cell.indexPath                        = indexPath;cell.collectionView                   = collectionView;cell.collectionGridView = self;[cell loadContent];return cell;
}- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {IrregularGridCellDataAdapter *adapter = _adapters[indexPath.row];return CGSizeMake(adapter.itemWidth, self.gridHeight);
}+ (instancetype)irregularGridCollectionViewWithFrame:(CGRect)framedelegate:(id <IrregularGridCollectionViewDelegate>)delegateregisterCells:(NSArray <IrregularGridViewCellClassType *> *)registerCellscontentEdgeInsets:(UIEdgeInsets)edgeInsetsverticalGap:(CGFloat)verticalGaphorizontalGap:(CGFloat)horizontalGapgridHeight:(CGFloat)gridHeight {IrregularGridCollectionView *irregularGridView = [[[self class] alloc] initWithFrame:frame];irregularGridView.delegate                     = delegate;irregularGridView.contentEdgeInsets            = edgeInsets;irregularGridView.verticalGap                  = verticalGap;irregularGridView.horizontalGap                = horizontalGap;irregularGridView.gridHeight                   = gridHeight;irregularGridView.registerCells                = registerCells;[irregularGridView makeTheConfigEffective];return irregularGridView;
}#pragma mark - CustomIrregularGridViewCellDelegate- (void)customIrregularGridViewCell:(CustomIrregularGridViewCell *)cell event:(id)event {if (self.delegate && [self.delegate respondsToSelector:@selector(irregularGridCollectionView:didSelectedCell:event:)]) {[self.delegate irregularGridCollectionView:self didSelectedCell:cell event:event];}
}#pragma mark - Setter & Getter- (void)setRegisterCells:(NSArray <IrregularGridViewCellClassType *> *)registerCells {_registerCells = registerCells;for (IrregularGridViewCellClassType *type in registerCells) {[self.collectionView registerClass:type.className forCellWithReuseIdentifier:type.reuseIdentifier];}
}- (CGSize)contentSize {CGSize size = [_flowLayout collectionViewContentSize];size.width  += self.contentEdgeInsets.left + self.contentEdgeInsets.right;size.height += self.contentEdgeInsets.top  + self.contentEdgeInsets.bottom;return size;
}- (void)resetSize {CGRect newFrame = self.frame;newFrame.size   = [self contentSize];self.frame      = newFrame;
}@end#pragma mark - IrregularGridViewCellClassType Class@implementation IrregularGridViewCellClassType@end